几个CSS-content的小例子

 <!DOCTYPE html>

 <html lang="en">

 <head>

     <meta charset="UTF-8">

     <title>Document</title>

     <style type="text/css">

         .demo1{

             position: relative;

             width: 200px;

             height: 50px;

             line-height: 50px;

             text-align: center;

             overflow: hidden;

         }

         .demo1:before{

             content: '我是';

         }

         .demo1:after{

             content: '';

             position: absolute;

             top: -50px;

             left: 0;

             width: 100%;

             height: 100%;

             transition: top .3s linear;

             background: rgba(0,0,0,.3);

         }

         .demo1:hover:after{

             top: 0;

             transition: top .3s linear;

         }

         .demo2:before{

             content: url('../images/gg.png');

         }

         .demo3:after{

             content: '_'attr(data-content)':'attr(class);

         }

         .demo4 p{

             counter-increment: mycount 1;

         }

         .demo4 p:before{

             content:'第'counter(mycount)'章 ';

         }

     </style>

 </head>

 <body>

     <h1>CSS-content应用</h1>

     <article>

         <header>

             <h2>content:''</h2>

         </header>

         <div class="demo1">content on here</div>

     </article>

     <article>

         <header>

             <h2>content:url('')</h2>

         </header>

         <div class="demo2">url属性加载图片</div>

     </article>

     <article>

         <header>

             <h2>content:attr()</h2>

         </header>

         <div class="demo3" data-content="我是">attr属性可以调用当前的属性值</div>

     </article>

     <article>

         <header>

             <h2>content:counter</h2>

         </header>

         <div class="demo4">

             <p>主题</p>

             <p>主题</p>

             <p>主题</p>

             <p>主题</p>

         </div>

     </article>

 </body>

 </html>
效果如下：
巴特西

几个CSS-content的小例子

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